Another Program question.....Bride's escort???

My parents are both deceased, as most of you know from previous questions, so my 27 yr old son will be escorting me down the isle. he will also be an usher. Typically it is assumed that the bride's father is escorting her down the isle, thus no additional mention other than in the "parents of the bride" section on the program.....should I list my son along with the other ushers? list him first in the list of ushers? or something else altogether??